Influence of cue-conditioning on acquisition, maintenance and relapse of cocaine intravenous self-administration

Eur J Neurosci. 2002 Apr;15(8):1363-70. doi: 10.1046/j.1460-9568.2002.01974.x.

Abstract

Conditioning theories propose that, through a Pavlovian associative process, discrete stimuli acquire the ability to elicit neural states involved in the maintenance and relapse of a drug-taking behaviour. Experimental evidence indicates that drug-related cues play a role in relapse, however, their influence on the development and maintenance of drug self-administration has been poorly investigated. In this report, we analysed the effects of a drug-associated cue light on acquisition, maintenance and reinstatement of intravenous cocaine self-administration. The results show that a cocaine-associated cue light can act as an incentive in absence of the drug, but does not directly modify drug-reinforcing effects. Contingent and non-contingent presentations of a cocaine-associated cue light reinstated an extinguished self-administration behaviour. However, regardless of whether or not a cue light was associated with cocaine infusions, rats acquire cocaine intravenous self-administration reaching the same levels of intake. Furthermore, after self-administration has been acquired in presence of the cue light, the omission of the cue light or its non-contingent presentation did not modify rat behaviour. In conclusion, our work shows that cocaine-associated explicit cues do not directly interfere with the reinforcing effects of the drug.

MeSH terms

  • Animals
  • Brain / drug effects*
  • Brain / physiopathology
  • Cocaine / pharmacology*
  • Cocaine-Related Disorders / physiopathology
  • Cocaine-Related Disorders / psychology*
  • Conditioning, Psychological / drug effects*
  • Conditioning, Psychological / physiology
  • Cues*
  • Dose-Response Relationship, Drug
  • Extinction, Psychological / drug effects
  • Extinction, Psychological / physiology
  • Injections, Intravenous
  • Male
  • Photic Stimulation
  • Rats
  • Rats, Sprague-Dawley
  • Recurrence*
  • Self Administration

Substances

  • Cocaine